Muffler with inclined partitions



Feb. 13, 1951 w. B. MCLEOD MUFFLER WITH INCLINED PARTITIONS Filed May 3, 1946 @rye 5 Patented Feb. 13,- 1951 UNITED *STATES PATENT OFFICE 3 Claims.

This" invention rrelates to improvements in mufers.

An object of the invention is to provide an improved muffler ,ofl relatively simple and durable construction that can be advantageously used on the exhaust pipe of Diesel engines as well as gasoline internal combustion engines which will effectively silence the exhaust and which is highly advantageous in that there is a minimum of back pressure developed by the mufller on the engine.

More specifically, an object of the invention is to provide an improved muler consisting of a chamber or tube having an inlet and an outlet with rows of perforated partitions or baffles secured to the opposite sides thereof which extend inwardly towards each other in staggered relation to each other but terminate short of the center of the chamber so as to leave a free and unobstructed passage from the inlet to the outlet.

With the foregoing and other objects in View, which will be made manifest in the following detailed description and specifically pointed out in the appended claims, reference is had to the accompanying drawings for an illustrative embodiment of the invention, wherein:

Figure l is a vertical section through the improved muffler embodying the present invention; and

Fig. 2 is a sectional view taken substantially upon the line 2--2 upon Fig. 1.

Referring to the accompanying drawings wherein similar reference characters designate similar parts throughout, the improved mufller comprises a cylindrical tube I surrounded by a concentrically arranged cylindrical shell II, the space between the tube and shell indicated at I2 constituting a relatively dead air space. End plates I3 and I II close the end of the tube and shell respectively. In the end plates there is an inlet passage provided by an exhaust pipe I5 which has secured thereto a frusto-conical member I6 that widens until it contacts the interior of the tube. passage I'I extends through the end plate I3 and has a truste-conical member I8 secured thereto. On opposite sides of the tube I0 there are formed inclined slots into which are inserted perforated battles or partitions I9. These bailles or partitions are welded in place on the exterior of the tube I0 and extend towards each other from the opposite sides of the tube. Those partitions or baffles which are arranged on one side of the tube are disposed in staggered relation to the partitions or battles on the other side ci the tube. All o! In a similar manner, the outlet f 2 the partitions or baiiles may or may not be perforated as indicated at 20 and while they extend towards each other they terminate short of the longitudinal central axis through the tube thus leaving a clear and unobstructed path or line of travel from the inlet I5 to the outlet I'I. The spacing between the adjacent edges of those partitions or baflles which are most adjacent the inlet I5 is preferably somewhat greater than the spacing between the adjacent edges of opposed partitions near the outlet.

The operation of the muiller is substantially as follows: Exhaust gases which enter the muffler through the inlet I5 are directed back and forth across the muffler from one partition or bale to its opposed partition or bale and may readily expand into the pockets formed between adjacent partitions or baffles. As the gases move through the mufller a somewhat of a whirling action may be developed in these various pockets. At all events I find that a muffler constructed in this manner is highly efficient in silencing the exhaust from the engine and creates a minimum of back pressure on the engine due to the free unobstructed passage through the muffler. A muffler of this character when installed on Dieselpowered trucks has the effect of greatly reducing if not entirely eliminating the objectionable smoke issuing from the engine. While the plates or partitions are preferably perforated this is.

not essential as they may in some instances be imperforate.

Various changes may be made in the details of construction without departing from the spirit and scope ofthe invention as defined by the appended claims.

I claim:

l. A muffler comprising a hollow elongated body providing an inlet and an outlet and being otherwise imperforate, partitions secured directly to the inner walls of the body only on two opposite sides thereof, the partitions on each side being equally spaced from one another and parallel and sloping inwardly toward the outlet and terminating short of the central axis of the body so as to leave a straight unobstructed passage from the inlet to the outlet, the partitions on one side of the body being staggered with relation to the partitions on the opposite side, the partitions on each side terminating approximately on the planes if extended of opposed partitions whereby there is provided pockets which guide exhaust gases from one side of the body into pockets on the other side back and forth along the body from the inlet t0 the outlet.

2. A mufller comprising a hollow elongated body providing an inlet and an outlet and being otherwise imperforate, partitions secured directly to the inner walls of the body on opposite sides thereof, the partitions on each side being parallel and sloping inwardly toward the outlet and terminating short of the central axis of the body so as to leave a straight unobstructed passage from the inlet to the outlet, the partitions on one side of the `body being staggered with relation to the partitions on the opposite side, the partitions on each side terminating approximately on the planes if extended of opposite partitions whereby there is provided pockets which guide exhaust gases from one side of the body into pockets on the other side back and 'forth along the body from the inlet to the outlet.

3. A muffler comprising a hollow elongated body providing an inlet and an outlet and being otherwise imperforate, ypartitions secured directly tothe inner walls of the body only fontwo :opposite sides thereof, tho partitions on each. side ben ing equally spaced from one another and parallel and sloping inwardly toward the outlet Aand `terminating short of the central axis of the body so as to leave a straight unobstructed passage from the inlet to the outlet, the partitions on one side of the body being staggered with relation to the partitions on the opposite side.

W. B. MCLEOD.

REFERENCES CITED The yfollowing references are ofk record in the ille of this patent:

UNITED STATES PATENTS 

